You could also insert the "set timeout=0" command near the end somewhere just to see if overriding it would help. (Any changes in that file would be lost when it's updated. You'd probably want to make a backup copy before playing with it.)

If you do reinstall and it works normally, copy the grub.cfg file out to compare.

Brian,I finally discovered my problem with the GRUB menu.I ended up reinstalling Linux Mint as I was frustrated and got the same darn thing!! The GRUB menu was there and I couldn’t skip it either. I struggled with the problem for 2 weeks or so to no avail. Yesterday, I was looking for a UUID for one of my drives and ran a “blkid” from CLI and saw I had a second /root partition on /dev/sdb2 (my “Images” HD, a 3TB conventional HD formatted in GPT). Linux won’t show a second /root or /home partition (or at least I don’t know how to show it) so I couldn’t see it when I was in Linux. I rebooted into BIBM and looked on my “Images” HD from Partition Work, sure enough, I had a /root partition and room for a /home partition on that drive. I must have been going to try install Linux on my “Images” drive at some point. (Obviously a seniors moment as I’m 76.) The bottom line was I had 2 /root partitions, but didn’t know it. In BIBM in the Boot Menu setup it simply showed the HD as GPT. I deleted the /root partition on my “Images” HD and extended the partition to fill the drive and sure enough, my GRUB menu disappeared. I thank you for your efforts to help me, but thought you would like to know what my problem was.

Brian,I finally discovered my problem with the GRUB menu.I ended up reinstalling Linux Mint as I was frustrated and got the same darn thing!! The GRUB menu was there and I couldn’t skip it either. I struggled with the problem for 2 weeks or so to no avail. Yesterday, I was looking for a UUID for one of my drives and ran a “blkid” from CLI and saw I had a second /root partition on /dev/sdb2 (my “Images” HD, a 3TB conventional HD formatted in GPT). Linux won’t show a second /root or /home partition (or at least I don’t know how to show it) so I couldn’t see it when I was in Linux. I rebooted into BIBM and looked on my “Images” HD from Partition Work, sure enough, I had a /root partition and room for a /home partition on that drive. I must have been going to try install Linux on my “Images” drive at some point. (Obviously a seniors moment as I’m 76.) The bottom line was I had 2 /root partitions, but didn’t know it. In BIBM in the Boot Menu setup it simply showed the HD as GPT. I deleted the /root partition on my “Images” HD and extended the partition to fill the drive and sure enough, my GRUB menu disappeared. I thank you for your efforts to help me, but thought you would like to know what my problem was.

Thanks for the feedback. I might have done something similar. I installed Ubuntu to HD0. 3 partitions, ESP, Linux, Swap. No grub issue. The partitions were imaged and then deleted. I installed Mint to HD0. 3 partitions, ESP, Linux, Swap. No grub issue. The partitions were imaged and then deleted.

HD1 was a GPT disk and the 6 partitions were restored to Free Space on the disk. So 2 ESP were present on HD1. I could boot each OS with EasyUEFI which was installed in Win10 (UEFI) on HD0. Mint had the grub issue and I can't recall whether Ubuntu had the issue as well.